21396640

素因数分解:

$2^5\times 5^1\times {\mathrm{173}}^1\times {\mathrm{773}}^1$

素因数の和:961

約数の個数: 48

約数和(自身を含む): 50907528

約数和(自身を除く): 29510888

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 173, 346, 692, 773, 865, 1384, 1546, 1730, 2768, 3092, 3460, 3865, 5536, 6184, 6920, 7730, 12368, 13840, 15460, 24736, 27680, 30920, 61840, 123680, 133729, 267458, 534916, 668645, 1069832, 1337290, 2139664, 2674580, 4279328, 5349160, 10698320, 21396640]

約数ペア:

[(1, 21396640), (2, 10698320), (4, 5349160), (5, 4279328), (8, 2674580), (10, 2139664), (16, 1337290), (20, 1069832), (32, 668645), (40, 534916), (80, 267458), (160, 133729), (173, 123680), (346, 61840), (692, 30920), (773, 27680), (865, 24736), (1384, 15460), (1546, 13840), (1730, 12368), (2768, 7730), (3092, 6920), (3460, 6184), (3865, 5536)]